Date: Tue, 09 Aug 2016 17:03:36 +0200 From: =?UTF-8?Q?Sol=C3=A8ne_Rapenne?= <solene@perso.pw> To: Aleksander Alekseev <afiskon@devzen.ru> Cc: freebsd-questions@freebsd.org, owner-freebsd-questions@freebsd.org Subject: Re: Power consumption tuning Message-ID: <fa791a431671032e9f0f47a7f8807957@mail.zplay.eu> In-Reply-To: <20160809172345.312117ac@e733> References: <20160809172345.312117ac@e733>
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Le 2016-08-09 16:23, Aleksander Alekseev a écrit : > Hello. > > I'm exploring how power consumption could be tuned on FreeBSD 11.0. I > discovered a few useful articles, for instance [1]. Also useful pieces > of advice were given on IRC. Resulting list is for now like this: > > * Use lightweight software (i3, GTK based GUI applications, etc), turn > off unused kernel modules, don't use full disc encryption, etc > * Reduce CPU frequency (sysctl dev.cpu.0.freq), use powerd to do it > automatically > * Reduce display brightness (sudo pkg install intel-backlight) > * Enable power save mode on NIC (sudo ifconfig wlan0 powersave) > * Disable unused USB devices (sudo usbconfig -d X.Y power_off) > * Reduce clock frequency (kern.hz = 100) > * Make sure your kernel is built without INVARIANTS and WITNESS > > Perhaps there are other methods I didn't notice? For instance are there > any other sysctl parameters or kernel configuration options worth > trying? > > [1] https://wiki.freebsd.org/TuningPowerConsumption Hello, Buying a device to measure the power consumption is also a good idea, so you can check your changes. It costs around 12€. Example http://www.ecvv.com/product/1000019919.html and better, it can be used to check everything at home after you're done with the computer :D
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